Means for suspending objects from reinforced concrete structures.



A. JORDAHL.

MEANS FOR SUSPENDING OBJECTS FROM REINFORCED CONCRETE STRUCTURESLAPPLICATION FILED JULY 2. 1914.

1,155,243. PatentedSept. 28, 1915.

ANDERS JORDAHL, OF BERLIN-WILMERSDORF, GERMANY.

MEANS FOR SUSPENDING- OBJECTS FROM REINFORCED CONCRETE STRUCTURES.

Specification of Letters IPatent.

Patented Sept. 28, 1915.

Application filed July .2, 1914. SeriaLNo. 848,631.

' essentially of a channel iron girder of a particular form intended tobe embedded in the known manner in the ceiling, beam, wall or the likeand to receive the heads of bolts 01' like fastening means the stems ofwhich project through a slot in the girder, the said heads beinglikewise of a particular form.

I have illustrated my invention in the ac co'mpanying drawing, in which:

Figure 1 shows a section of a reinforcedconcrete beam in which one formof my improved channel iron girder is shown embedded, and Fig. 2 shows asection of the channel iron girder separately, with a boltmounted insame.

The girder lshown in the drawing is of rectangular cross-section, but Iwish it to be understood that the invention is not limited to thisparticular shape, the characteristic features being that the girder isformed with vertical ribs 4 and adapted to be engaged with reinforcingirons embedded in the body of the concrete. The hollow space 2 receivesthe head 6 of a bolt, the stem 5 of which projects through a slot 3which ma extend the whole or part of the length 0 the girder. The ribs4: are formed on the girder at the sides of the slot to receiveoverhanging projections 7 formed on the underside of the head of thebolt for the purpose of preventmg the bolt from rotating unless the boltis pushed upward clear of the said ribs 4:- The head 6 of the bolt isrectangular in crosssection and its dimensions such that when raisedfrom its seat and turned at right angles to the position shown in Fig. 2it can be Withdrawn through the opening 3.

The upper portion of the girder 1 is formed with an upstanding rib 8 inwhich apertures 9 are formed in which angle irons 10 that are intendedto be embedded in the concrete are engaged.

I have shown in Fig. 1 by way of example a plumber-block 11, mounted inaccordance with-my invention, but I wish it to be understood that theinvention is equally applicable for securing or suspending any kind offittings such as lamps, pipes, etc.

Flat bars of iron bent as indicated in the drawing are very suitable forsecuring the girder 1, and it is advisable to provide sheet metal capsfor the open ends of the girders to prevent the concrete finding its wayinto the channel.

I claim:

A. slotted hollow means for suspending objects from reinforced concreteand other structures and for the reception of securing bolts forplumber-blocks comprising in combination, horizontal flanges forming thewalls of said slot, reinforcing lugs on said flanges extending into thehollow profile space and bolt heads provided with grooves into whichsaid lugs engage with a limited play, substantially as described.

In testimony whereof I have hereunto set my hand in presence of twowitnesses.

ANDERS JORDAHL.

Witnesses:

Hans Prnrrnn, Com Scnnonnnn.

